Microstructure influence on corrosion behavior of a Fe–Cr–V–N tool alloy studied by SEM/EDS, scanning Kelvin force microscopy and electrochemical measurement

Sababi, Majid; Ejnermark, Sebastian; Andersson, Jörgen; Claesson, Per M.; Pan, Jinshan

doi:10.1016/j.corsci.2012.09.013

Cited by 23 publications

(15 citation statements)

References 26 publications

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“…10 kHz) in order to avoid cross-talking disturbances between the two signals. The instrumental details have been described elsewhere [14,15]. The probes used for the KFM were Nanoprobes SPM probes of SCM-PIT type purchased from Bruker, with the length of 200-250 µm, a resonance frequency of 60-100 kHz, a spring constant of 1-5 N/m and with a conducting coating (Pt-Ir) necessary for the electrical measurement.…”

Section: Kfm Measurementsmentioning

confidence: 99%

Study of corrosion behavior of a 22% Cr duplex stainless steel: Influence of nano-sized chromium nitrides and exposure temperature

Bettini

Kivisäkk

Leygraf

et al. 2013

Electrochimica Acta

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PostprintThis is the accepted version of a paper published in Electrochimica Acta. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Bettini, E., Kivisäkk, U., Leygraf, C., Pan, J. [Year unknown!] Study of corrosion behavior of a 22% Cr duplex stainless steel: influence of nano-sized chromium nitrides and exposure temperature. Electrochimica ActaAccess to the published version may require subscription. AbstractChromium nitrides may precipitate in duplex stainless steels during processing and their influence on the corrosion behavior is of great importance for the steel performance. In this study, the influence of nanosized quenched-in chromium nitrides on the corrosion behavior of a heat treated 2205 duplex stainless steel was investigated at room temperature and 50 °C (just above critical pitting temperature). The microstructure was characterized by SEM/EDS and AFM analyses, and quenched-in nitrides precipitated in the ferrite phase were identified by TEM analysis. Volta potential mapping at room temperature suggests lower relative nobility of the ferrite matrix. Electrochemical polarization and in-situ AFM measurements in 1 M NaCl solution at room temperature show a passive behavior of the steel despite the presence of the quenched-in nitrides in the ferrite phase, and preferential dissolution of ferrite phase occurred only at transpassive conditions. At 50 °C, selective dissolution of the austenite phase was observed, while the ferrite phase with the quenched-in nitrides remained to be stable. It can be concluded that the finely dispersed quenched-in nitrides do not cause localized corrosion, whereas the exposure temperature has a strong influence on the corrosion behavior of the duplex stainless steel.

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Section: Kfm Measurementsmentioning

confidence: 99%

Study of corrosion behavior of a 22% Cr duplex stainless steel: Influence of nano-sized chromium nitrides and exposure temperature

Bettini

Kivisäkk

Leygraf

et al. 2013

Electrochimica Acta

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“…2b, obtained from the KFM measurement, shows that the nitride particles have a higher Volta potential than the alloy matrix. Furthermore, those darker nitride particles (enriched in vanadium and nitrogen) exhibit higher Volta potential in the SEM image than lighter nitride particles, as reported previously [25]. Thus, it would be expected that under corrosive conditions the different nitride particles would likely show a different tendency to corrosion.…”

Section: Microstructure and Corrosion Tendencymentioning

confidence: 53%

“…An earlier study showed that pitting can initiate and develop in these matrix areas under accelerated conditions in a similar NaCl solution [25]. However the height images show that the small features (size range tens of nanometres) protrude from the surface and cannot thus be considered as pitting phenomena per se.…”

Section: Pre-pitting Eventsmentioning

confidence: 96%

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Role of microstructure on corrosion initiation of an experimental tool alloy: A Quantitative Nanomechanical Property Mapping study

et al. 2014

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a b s t r a c tThe adhesion properties of a FeCrVN experimental tool alloy immersed in pure water and sodium chloride solution have been studied by Quantitative Nanomechanical Property Mapping to understand the influence of microstructure on corrosion initiation of this alloy. The approach used here allows early observation and identification of pre-pitting events that may lead to passivity breakdown of the alloy. Adhesion provides a good distinction between the different regions and we ascribe this to their vanadium and nitrogen contents. Finally, the prepitting is characterized by generation of small particles in specific regions of the surface with low chromium content.

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“…[16,17] In particular, in Reference 17, the correlation between the corrosion resistance and structure of the Fe-20pctCr-9pctV-4pctN alloy prepared by powder metallurgy was investigated. This alloy exhibits the improved corrosive behavior as compared to that of commercial high-carbon steel Elmax.…”

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confidence: 99%

Structure, Mechanical Properties, and Fracture Behavior of a Fe-Cr-V Alloy Doped with Nitrogen by High-Temperature Gas-Phase Nitriding

Nikulin

Хаткевич

Рогачев

et al. 2015

Metall Mater Trans A

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The microstructure, phase composition, and room-temperature mechanical properties of the corrosion-resistant Fe-20pctCr-5pctV alloy doped with nitrogen by high-temperature gas-phase nitriding under different conditions have been investigated. The nitriding of the Fe-20pctCr-5pctV alloy at T = 1223 K to 1373 K (950°C to 1100°C) and subsequent annealing at T = 973 K (700°C) lead to the precipitation of large vanadium nitride and disperse chromium nitride particles in the ferrite matrix. Such a treatment increases the strength of the Fe-20pctCr-5pctV alloy at room temperature by 1.6 times, while maintaining the adequate relative elongation. The alloy in the initial state and after nitriding is highly resistant to corrosion.

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Microstructure influence on corrosion behavior of a Fe–Cr–V–N tool alloy studied by SEM/EDS, scanning Kelvin force microscopy and electrochemical measurement

Cited by 23 publications

References 26 publications

Study of corrosion behavior of a 22% Cr duplex stainless steel: Influence of nano-sized chromium nitrides and exposure temperature

Study of corrosion behavior of a 22% Cr duplex stainless steel: Influence of nano-sized chromium nitrides and exposure temperature

Role of microstructure on corrosion initiation of an experimental tool alloy: A Quantitative Nanomechanical Property Mapping study

Structure, Mechanical Properties, and Fracture Behavior of a Fe-Cr-V Alloy Doped with Nitrogen by High-Temperature Gas-Phase Nitriding

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